Indoor Unit Connection Points For Centralized Controller; Indoor Unit Connection Points For On/Off Device - Lennox MPA009S4S Service Manual

16.2. Indoor Unit Connection Points for Centralized Controller

Mini-split indoor units can be connected to a centralized controller (e.g. Lennox VRF Manager - LVM or Trane Tracer) or a
BACnet or Lonworks gateway using the XYE terminals on the indoor unit main board.
X
To CCM
Comm.Bus
Indoor Unit Connection Points
Typical Wiring Diagram

17. Indoor Unit Connection Points for ON/OFF Device

Mini-split indoor units can be connected to an external device such as a fire alarm system using two dry contacts on the
indoor unit main board. These dry contacts allow the external device to turn the indoor unit on or off.
( E )
Y
Y/G
Figure 60. Connection Points
Figure 61. Indoor Unit Connection Points (Typical)
Indoor Unit Connection Points
88
Typical